On the left toolbar, there is the option to create charts 

Select and then create a box in the report grouping that you want the chart.

Select the chart and a little blue box will pop up in the corner.

A Chart Tasks dialog box will pop open and here you can select "Run Wizard"

The will enable the Chart Wizard

Chart Type

You can select the type of chart you want.  Examples are Bar charts, Line Charts and Bubble Charts.

Appearance

Set the Color schemes for your charts.

Series

This is where you set the different series you want and what type of chart you want for the series.  Each series will be data values in the chart and the arguments to be set for each.

Data

This is where you will bind the data to the series.

Chart

Set formatting for the Chart such as backgrounds.

Diagram

Set any secondary axis to the chart

Panes

Set formatting and Appearance of the chart.

Axes

Formatting the axis and the ranges for the data values.

Series Views

Formatting the series or the chart data

Point Labels

Show the data points with Labels and how to format those labels

Chart Titles

Add a chart title and format it.

Legend

Add a Legend and format it.

Annotations

Add Annotations at different points in the chart.

Here is additional information from Dev Express on Charts: https://docs.devexpress.com/XtraReports/2609/detailed-guide-to-devexpress-reporting/use-report-controls/use-charts/use-charts-in-reports

Scripts to group chart data:

Private Sub chart1_BeforePrint(ByVal sender As Object, ByVal e As System.Drawing.Printing.PrintEventArgs)
Dim xrc As XRChart = CType(sender,XRChart)
Dim filter_value As String = GetCurrentColumnValue("General_GroupCode")
' System.Windows.Forms.MessageBox.Show(filter_value)
if Not String.IsNullOrEmpty(filter_value) then
For each srs as Series in xrc.Series
srs.DataFilters.Clear
srs.DataFilters.Add(New DataFilter("LayerReportData.General_GroupCode", "System.String", _
DataFilterCondition.Equal, filter_value))
Next
end if

End Sub